Sinew extractor



May 17, 1927.

J. A. MaCDONALD SINEW EXTRACTOR Filed July 28. 1926 Patented May 17,1927.

- 'uNiTEf ST res JAMES A. MAGDONALD, or BosToN, MASSACHUSETTS.

PATENT f OFFICE. ii

smnw EXTRACTOR.

Application mea July 2s, 192e. serial No. 125,413.

This invention relates to a sinew extractor of the type shown by theCongdon Patent, No. 941,759, dated November 30, 1909, said extractorconsisting or' a base adapted to be on the side adjacent to thefoot-holder, the.

jaws being adapted to engage an enlarged fleshy portion of a owls legbelow the footholder when the lever` is raised, and operating toseparate the leg from the foot and extract the sinews when the lever ismoved downward, all as more particularly set forth by the Congdonpatent.

The present invention is an improvement on the device of the Congdonpatent, and is embodied in a foot-holder formed to en? gage the bonyportions or' legs of different sizes, and a multiple claw on the lever,also formed to engage the bony portions of legs of different sizes, sothat the extractor may operate on* larger or smaller legs, withoutadjustment of any of its parts, and without liability of the wedgingadhesion Vof a brohenl otl' foot and leg portion to the arm.

Ot' the accompanying drawings forming f a part of this specification,-

Figure 1 is a front elevation'of a sinew Aextractor embodying myimprovement, the

lever being fully lowered.

Figure 2 is a side elevation of the same..

Figure 3 is a side elevation, showing the lever raised, and the footholder and two of the prongs engaged with a larger leg, the sinews beingpartly extracted.

Figure 4 is a, view similar to Figure 3,

" 'showing the foot-holder and two of the prongs engaged with a smallerleg.

The same reference characters indicate the same parts in all of thefigures.

a designates a base adapted to be secured to a wall by screws orotherwise. designates a foot-holder which is an arm or bracketprojecting forward :trom the baseby Figures 3 and 4, and theadjacentedges 'i of said recess are beveled and provided withv a sharp-edge on the upper side of the lower finger over lwhich the legv may .beeasily broken,` as shown by the- Gongdon patent.

0. designates the handlever connectedibv a pivot 02, to ears on thebase, the pivotal connection being arranged as heretofore, below and atone side of the foot-holder.

yThe leg-engaging member in the Congdon patent is a claw, arranged onandrigidly' attached Vto the lever c near its pivot, and

projects laterally from that sid-e of the lever adjacent thefoot-holder, so that-When the lever is fully raised on its pivot, theclaw engages the leg below the foot-holder, and

then, as the lever is moved downward, the

fleshy part of the leg is drawn down, while the bony part remains fixedin` th-e footholder, so that the sinews are extracted from the fleshypart or' the leg, as described by the Congdon patent. f

In carrying 'out the present invention, I provide the foot-holder recesswith a wider outer portion, formed by parallel recess edges 12, 12constituting outer jaws, spaced apart to receive between themv the bonyportion Z of a larger leg adjoining the foot e,

as shown by Figure 3, and anarrower inn-er portion, formed by parallelrecessedges 13, 13 Vconstituting innerjaws, spaced apart to receivebetween them the bony portion of a smaller leg, as shown by Figure 4.The leg shown by Figure 3, may be that of a tur hey, and the leg shownby Figure 4, that of hen.

I also provide the lever c with'a multiple claw, composed of two endprongs 14 and 15, and an intermediate prong 16. The end prong 14 isspaced from the intermediate prong 16, by a recess, thevedges of whichconstitute outer jaws adapted to engage the bony portion Z of a largerleg adjoining the fleshy portion f, as shownby Figure. 8,

while the end prong 15 is spaced from the. intermediate vprong by arecess, theedges of which constitute inner jaws adapted to engage thebony portion of a smaller leg, as shown by Figure 4. The operator, may,

therefore, use the outer jaws of the arm b l and the outer jaws formedby the claws 14 and 16 on a relatively large ,legf and the inner jaws ofthe arm and the inner jaws formed by the claws 15 and 16 on a smallerleg. j j

a:The parallelism of the outer and innerv arm vjaws formedbytheedges-lQ, V12 and 13, 1 3,

, nient with the bodyI portionl adjoining the foot, so that thebroken-off leg portion ed! hering to the foot is not liable toKhfrvrelza` ivedging adhesion to the arm, and drops freely from the arinafterthe sineivfextraeb ing operation. If the edges of the arm recessWereinelinen relative toeach other, to forni :i nedge-sha-ped recess,the broken off leg portion adjoining the foot lwould be liable `toadhereto the erin :ind require foreible .pulling out by the operator, sothat 'loss ofl time would be involved.

sinew extruetorincluding a base, a footholdin'g varm proj eeting forwardfrom the upper'poition ofthe base and having a recess lrdziptedtofreeeive the bony portion oa foWls leg adjoining thebfoot,seiclvrecess be sided outer portion, theedge's of which form ingcomposedof relatively Wide parallel' outer ljaws adapted to lhave anon-Wedging engagement with a larger legend at` narrower parallel sidedinner portion, the edges el3 njhieliwlform iinneiyjgi vs ladapted tohave e nonWedging eifgzigenient with :i` smaller leggi, :ind hand leverpivoted to the base loelow the al1-n1, and provided With a multiple Clawadapted toreCeive the bony portion olf a leg` adjoining the leshyrpor-tion thereof, sirid Claw having" a larger recess, `the edgesofwhich lorin outer jen/sf, formed and'positioned to .cooperetejvth the.outer` jaws oi the mijn ,in eiitracting'sinews l'rom e larger lofi',:1nd :i snniller recess,vk the edges of which forni inner jaws, lorniedfund .positioned to eoeperete With-the inner aivs of the arm `inextll'eting sine'wsfroni e smaller leg, the parallelism; of the arm jawspreventing e Wedging adhesion of a? broken off le'g and foot to thearm;Y

In testimonywhereof I' have efliXednmy signature.

.nii-nis A. Mieijoivnnn

